高性能反渗透膜,分离层由高选择性聚酰胺网络和多孔有机笼组成

IF 8.3 1区 工程技术 Q1 ENGINEERING, CHEMICAL Desalination Pub Date : 2024-10-10 DOI:10.1016/j.desal.2024.118190
Yanan Yao, Tianyi Xia, Jiaci Wang, Zhuan Yi, Wentao Yan, Yong Zhou, Congjie Gao
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引用次数: 0

摘要

反渗透(RO)膜技术在许多领域都有广泛的应用,如海水淡化和有机物去除。反渗透膜技术的一个长期目标是开发具有高阻隔性的高渗透反渗透膜。分离层微结构的升级是关键所在。分离层微观结构的一个理想设计是,分离层中有丰富的快速水传输通道,同时聚酰胺(PA)网络具有高选择性。增加快速水传输通道的最简单策略是通过水相或有机相添加的方式在分离层中引入功能材料。有机相添加法更为有效。然而,大多数报道的功能材料都不能很好地溶解或分散在有机相中,因此不适合采用这种方法。此外,PA 网络虽然对剔除至关重要,但其受到的关注度却低于以往的功能材料。本研究提出通过有机相添加法,在分离层中引入多孔有机笼(CC3)作为快速水传输通道的供应者,并借助油溶性表面活性剂,构建上述类型的分离层,通过表面活性剂组装调控界面聚合,形成高选择性 PA 网络。我们的策略非常高效。通过使用极少量的 CC3(0.005 % w/v)和表面活性剂(0.0025 % w/v),可实现 93.6 L-m-2-h-1 的通量(增加了 43.1 %)、98.82 % 的盐排斥率和 7864 的水/盐选择性。对于海水淡化反渗透膜而言,这一性能处于较高水平。同时,所开发的反渗透膜对低分子量(<300 Da)有机化合物的去除性能也有所提高。有机物去除率超过 91.00%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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High performance reverse osmosis membrane with a separation layer consisting of highly selective polyamide networks and porous organic cages
Reverse osmosis (RO) membrane technology has widespread applications in many fields, such as desalination and organics removal. A long-standing goal for RO membrane technology is developing highly permeable RO membranes with high rejection. Upgrading of the separation layer microstructure is the key. One ideal design for the separation layer microstructure is that the layer is rich in fast water transport channels and meanwhile the polyamide (PA) networks are highly selective. The simplest strategy to increase fast water transport channels is introducing functional materials into the separation layer via the aqueous or organic phase addition. The organic phase addition method is more effective. However, most functional materials reported cannot be dissolved or dispersed well in the organic phase, which are not suitable for this method. Besides, the attentions that PA network received were less than functional materials in the past, though it is crucial for the rejection. This work proposes to construct the kind of separation layer mentioned above via introducing a porous organic cage (CC3), which is an intrinsically porous organic molecule with oil solubility, in the separation layer as the supplier for fast water transport channel by the organic phase addition method, and with the aid of an oil-soluble surfactant, which contributes to the formation of highly selective PA networks through surfactant-assembly regulated interfacial polymerization. Our strategy is efficient. By using a tiny amount of CC3 (0.005 % w/v) and surfactant (0.0025 % w/v), a flux of 93.6 L·m−2·h−1 (an increase of 43.1 %), a salt rejection of 98.82 % and a water/salt selectivity of 7864 can be achieved. This performance is at high level for a desalination RO membrane. Simultaneously, the developed RO membrane exhibited an improved removal performance for organic compounds with low molecular weight (<300 Da). The organics rejection exceeded 91.00 %.
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来源期刊
Desalination
Desalination 工程技术-工程:化工
CiteScore
14.60
自引率
20.20%
发文量
619
审稿时长
41 days
期刊介绍: Desalination is a scholarly journal that focuses on the field of desalination materials, processes, and associated technologies. It encompasses a wide range of disciplines and aims to publish exceptional papers in this area. The journal invites submissions that explicitly revolve around water desalting and its applications to various sources such as seawater, groundwater, and wastewater. It particularly encourages research on diverse desalination methods including thermal, membrane, sorption, and hybrid processes. By providing a platform for innovative studies, Desalination aims to advance the understanding and development of desalination technologies, promoting sustainable solutions for water scarcity challenges.
期刊最新文献
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